loop.php

<?php
// WP_Query arguments
$args = array (
	'post_type'              => 'tipodopost',
	'category_name'          => 'slugdacategoria',
	'posts_per_page'         => '-1',
);

// The Query
$query = new WP_Query( $args );

// The Loop
if ( $query->have_posts() ) {
	while ( $query->have_posts() ) {
		$query->the_post();
?>
  <a href="<?php the_permalink(); ?>"<?php the_thumbnail(); ?>
  <?php the_title(); ?></a>
  
<?php		
	}
} else {
	// no posts found
}

// Restore original Post Data
wp_reset_postdata();
?>